Spring bolster



Dec. 7 1926.

D. CANEVARO SPRING BOLSTER Filed Dec. 12, 1924 2 Sheets-Sheet l- Dec. 7, 1926. 1,610.03?

' D. CA NEVARO SPRING BOL-STER File"! Dec 12, 1924 ZSheetS-ShBet 2 Patented Dec. 7, 1926.

warren STATES isiaosv PATENT OFFICE.

QDOMI'NIG GANEVAROKOE OLD wrvns, SASKATCHEWAN, CANADA.

SPRING IBOLSTER.

Application filed December 12, 1924, Serial No. 755,548, and in Canada February 28, 192 1.

This invention relates to improvements in spring bolsters, and the objects of the invention are to provide a simply constructed and effective device of this character in which the several parts will more satisfactorily per form the various functions required of them.

Further objects are the provision of a device of this character in which the springs can be replaced and attended to individually without interfering with the other parts of the device.

With the foregoing and other objects in View, the invention consists essentially in the novel construction and arrangement of parts described in the present specification and illustrated by the accompanying drawings that form part of the same. 7

Referring now to the drawings, in which like characters of reference indicate corresponding parts in each figure:

Figure 1 is a perspective view of the rear bolster.

Figure 2 is a similar view of the front bolster.

Figure S'is a longitudinal section of the rear bolster.

Figure 4 is a longitudinal section of the front bolster.

Figure 5 is a section on line 55 of Figure 3.

Figure 6 is ure a.

In the drawings A designates one of the bolsters as a whole and with particular reference to the rear bolster as illustrated in Figure 1, comprising a bolster bar or body 10 partially recessed on the underside at 11 and formed with supporting end portions 12 on which are fixedly mounted standards 13 and 14, and formed with sides 10 Spaced above the body 10 and notched at each end at 15 to slidably engage with the standards a section on line 6-6 of 18 and 14: is a follower 16. The bolster bar or body 10 is provided with a plurality of partitions 17 adapted to form a plurality of separate compartments in which are arranged a series of spiral springs 18, the centre partition 19 of the series 17 being of substantially larger proportions than the others to correspond with partitions or cross-bars 20 and 21 at each end of the bolster bar and adjacent the standards. The object of having these end and middle partitions made of solid rubber blocks of greater height than the others is to prevent the springs being affected by a more than ordinary shock caused .either by extra weight on the wagon or by the unusually uneven surface of the road on which the wagon may be travelling. The follower 16 is secured in slidable relationship with the body 10 by means of bolts 22 extending loosely therethroughand through the body and provided with suitable nuts so that the follower, while being retained in position by the bolts in combination with the notched ends in engagement with the standards, may be at liberty to move downwardly according to the Weight imposed upon it, and automatically to move upwardly by the action of the springs to normal position.

On the standards 13 and 14 are provided stake rings 23, while the follower is also providedwith loops 24 adapted to engage with chains 25 carrying nut and bolt securing means 26 to hold a box in place when required.

Referring now more particularly to Figure 2, in which the front bolster is illustrated, the construction is practically the same as for the rear bolster except that the bolster bar on the-underside is of the usual standard construction with an enlargement or offset 2'7 in the centre on which is mounted the wearing plate 28 and, in addition to the bolts 22, is also provided with a centre and similar bolt 29 with which the follower 16 slidably engages.

From the foregoing it will be seen that each spring is independent of the others and can be, when the occasion arises, attended to or replaced in its own compartment and, further, that in the event of exceptional shocks or heavy roads the travel of the follower is limited suliiciently to prevent the springs being injured.

As many changes could be made in the above construction and many apparently widely different embodiments of my invention, within the scope of the claim, constructed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

hat Iclaim as my invention is:

A bolster comprising a cross plate terminating in vertical standards and having its upper face recessed to provide a longitudinally extending channel and a series of spaced cross bars subdividing said channel into a plurality of separate compartments,

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the central and terminal cross bars of said series being of greater dimensions than the remaining cross bars and of sufficient height to project upwardly above said remaining cross bars and above the side Walls 0% the channel, a follower plate having notched ends slidably embracing said standards so as to be guided thereby, a plurality of coil springs having their loWer ends seated in the compartments of the cross plates and their upper ends supportingly engaging the underside 01 the follower plate, securing bolts passing through both the follower plate and the cross plate and equipped at their lower with the cushioning action of the springs,

said bolts being slidable through said cross plate and said nuts being adjustable on the bolts to tighten. the same when neeessary to compensate for slaokness in the springs.

In Witness whereof I have hereunto set. my hand.v

DQMINIC .CANEVAEO. 

